If 36 persons can finish 50% of work in 12 days In how many days 72 person can finish the complete work?

P and Q can do work separately in 10 and 20 days, respectively. In how many days can they finish it, working together?

Find in whichever condition/conditions filling of water tank is/are possible :

A. One tap filling the tank in 2 liter / minute.

B. One tap filling the tank in 15 liter / minute and one tap emptying the tank with speed 1 liter / minute.

C. Two tap filling the tank with uniform speed of 4litre/minute and one tap emptying the tank with speed of 500 ml / sec.

D. One tap filling the tank in 2 liter / minute and one tap emptying the tank with speed 4 liter / minute.

Choose the correct answer from the options given below:

A and B working together can do a work in 10 days. If A can do the work in 15 days, then how many days will B take to do the same work?

X, Y and Z together can do a piece of work in 16 (4/11) days. X and Y together can do the same work in 20 days. In how many days will Z alone finish the 60% of the work?

Ram, Shyam and Hari can complete a work in 20, 25 and 30 days, respectively.

Consider the following statements:

(A) Ram and Shyam together will complete the work in $11\frac{1}{9}$ days.

(B) Shyam and Hari together will complete the work in 14 days.

Choose the correct answer from the options given below:

A and B working together can finish a piece of work in 12 days while B alone can finish the same work in 30 days. Then determine that in how many days can A alone finish the same work?